#include <iostream>

using namespace std;

void Keeper(int a);
void Changer(int & a);

int main() {
     int data =7;

     cout << "In the main, data = " << data << endl;
     Keeper(data);
     cout << "In the main, data = " << data << endl;
     Changer(data);
     cout << "In the main, data = " << data << endl;

     return 0;
      
}

void Keeper(int a){
    cout << "In Keeper, a = " << a << endl;
    a = 999999;
    cout << "In Keeper, a = " << a << endl;
    return;
}

void Changer(int & a){
    cout << "In Changer, a = " << a << endl;
    a = 999999;
    cout << "In Changer, a = " << a << endl;
    return;
}